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Aqueous Colloidal Dispersions of Polyaniline Particles

Published online by Cambridge University Press:  25 February 2011

Steven P. Armes  and
Mahmoud Aldissi
Steven P. Armes
Affiliation:
Presently at University of Sussex, School of Chemistry and Molecular Sciences, Brighton BN1 90J, United Kingdom
Mahmoud Aldissi
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, P. 0. Box 1663, Los Alamos, NM 87545
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Abstract

Colloidal polyaniline has been prepared in acidic aqueous media by a modified chemical polymerization of aniline in the presence of a tailor-made polymeric surfactant. The surfactant which acts as a steric stabilizer used in this study is derivatized poly(vinyl alcohol-co-vinyl acetate). This surfactant contains pendant aniline units which participate in the aniline polymerization, resulting in the formation of sterically-stabilized polyaniline particles which have a non-spherical “rice-grain” morphology.

It is shown that this novel form of polyaniline is more processable than the bulk powder that is normally obtained from a conventional chemical synthesis. The solid-state conductivity of solution-cast films or compressed pellets of these dispersions is surprisingly high (⋍ 1 S/cm), despite the presence of the insulating outer layer of chemically-grafted stabilizer.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 173: Symposium Q – Advanced Organic Solid State Materials , 1989 , 311
Copyright
Copyright © Materials Research Society 1990

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References

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